From owner-cvs-all  Mon Jan 15 19:46:17 2001
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From: John Baldwin <jhb@FreeBSD.org>
Date: Mon, 15 Jan 2001 19:45:55 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/i386/include mutex.h
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jhb         2001/01/15 19:45:55 PST

  Modified files:
    sys/i386/include     mutex.h 
  Log:
  - Use "+a" instead of "=&a" for several constraints.  This should fix
    compiling errors where gcc would run out of registers.
  - Add "cc" to the list of clobbers for micro-ops where we perform
    instructions that alter %eflags.
  - Use xchgl instead of cmpxchgl to release a spin lock.  This could allow
    for more efficient register allocation as we no longer mandate that %eax
    be used.
  - Reenable the optimized mutex micro-ops in the non-i386 case.
  
  Revision  Changes    Path
  1.23      +20 -26    src/sys/i386/include/mutex.h



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